p−ρ−T Behavior of Four Lean Synthetic Natural-Gas-Like Mixtures from 250 K to 450 K with Pressures to 37 MPa
p−ρ−T Behavior of Four Lean Synthetic Natural-Gas-Like Mixtures from 250 K to 450 K with Pressures to 37 MPa
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四种贫合成类天然气混合物在 250 K 至 450 K 和 37 MPa 压力下的 p−ρ−T 行为
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发表时间：
2011
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影响因子：
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通讯作者：
M. McLinden
中科院分区：
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作者：
M. McLinden
用双卡式磁悬浮密度计测量了四种稀薄合成天然气混合物在250k、350k和450k等温线和37 MPa压力下的p−ρ−T行为。重量制备的混合物有七到九种成分（甲烷到戊烷）。它们名义上都是0.90摩尔甲烷馏分，它们的主要区别在于戊烷和异戊烷的含量以及氮和二氧化碳的存在与否。密度分析考虑了密度计磁悬浮联轴器的传力误差和流体的磁效应。这些数据与天然气混合物的GERG 2004和AGA-8模型进行了比较。在较高温度（T = 350 K和T = 450 K）和较低压力（p < 15 MPa）下，两种模型计算的密度与实测数据基本吻合，平均偏差小于0.05%。但在较高的压力和较低的温度下，平均偏差是相当大的。
The p−ρ−T behaviors of four lean synthetic natural gas mixtures were measured along isotherms of 250 K, 350 K, and 450 K with pressures to 37 MPa with a two-sinker, magnetic-suspension densimeter. The gravimetrically prepared mixtures have seven to nine components (methane to pentane). They are all nominally 0.90 mole fraction methane, and they differ primarily in the amount of pentane and isopentane and the presence or absence of nitrogen and carbon dioxide. The analysis for density accounts for the force transmission error in the magnetic suspension coupling (MSC) of the densimeter and the magnetic effects of the fluid. These data are compared to the GERG 2004 and AGA-8 models for natural gas mixtures. The densities calculated by both the models are generally in very good agreement with the data, with average deviations less than 0.05 %, at the higher temperatures (T = 350 K and T = 450 K) and lower pressures (p < 15 MPa). But at higher pressures and lower temperatures, the average deviations are substa...